Thanks to all for the suggestions. I did do lsof on the process and saw
nothing interesting (just libraries). Attaching gdb to the process
showed that it appeared to be looping inside getservbyname().
However, after a little more thought, I "rm -rf"d /var/spool/cups/
(which had some stuff from 2007) and restarted. No more looping! Now I
can configure my printers. We'll see whether it keeps working.
Dan
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